Preparation and gas-sensing properties of NiFe2O4 semiconductor materials

Liu-fang, Yang; Xie, Yongbing; Zhao, Heyun; Wu, Xinghui; Wang, Yude

doi:10.1016/j.sse.2005.03.022

Cited by 65 publications

(34 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nickel ferrite (NiFe 2 O 4 ) nanoparticles have been widely studied for their unique magnetic properties which can be influenced by their shape, particle size and their composites with other materials [1][2][3]. Nickel ferrite based nanomaterials also have different practical applications in high frequency devices, power transformers, drug delivery and gas sensors [4].…”

Section: Introductionmentioning

confidence: 99%

Comparison of surface effects in SiO2 coated and uncoated nickel ferrite nanoparticles

Nadeem

Krenn

Sarwar

et al. 2014

Applied Surface Science

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Comparison of surface effects in SiO2 coated and uncoated nickel ferrite nanoparticles

Nadeem

Krenn

Sarwar

et al. 2014

Applied Surface Science

View full text Add to dashboard Cite

“…Soft spinel ferrites are magnetic material having interesting properties such as low melting point, -saturation magnetization and -coercivity [1][2][3]. Ferrites with these properties can be beneficial in many applications such as in transformer cores, ferro-fluids, drug delivery, and gas sensors [4,5].…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing on properties of Mg doped Zn-ferrite nanoparticles

Nadeem

Rahman

Mumtaz

2015

Progress in Natural Science: Materials International

View full text Add to dashboard Cite

A comparison of structural and magnetic properties of as-prepared and annealed (900 1C) Mg doped Zn ferrite nanoparticles (Zn 1 À x Mg x Fe 2 O 4 , with x ¼0, 0.1, 0.2, 0.3, 0.4 and 0.5) is presented. X-ray diffraction (XRD) studies confirmed the cubic spinel structure for both the as-prepared and annealed nanoparticles. The average crystallite size and lattice parameter were increased by annealing. Scanning electron microscopy (SEM) images also showed that the average particle size increased after annealing. Fourier transform infrared spectroscopy (FTIR) also confirmed the spinel structure for both series of nanoparticles. For both annealed and as-prepared nanoparticles, the O-M tet. -O vibrational band shifts towards higher wave numbers with increased Mg concentration due to cationic rearrangement on the lattice sites. Magnetization studies revealed an anomalous decreasing magnetization for the annealed nanoparticles which is also ascribed to cationic rearrangement on the lattice sites after annealing. The measurement of coercivity showed a decreasing trend by annealing due to the increased nanoparticle size and better crystallinity.

show abstract

“…As a kind of important spinel ferrite, NiFe 2 O 4 has attracted much interest because of its fascinating magnetic and electromagnetic properties 1 . NiFe 2 O 4 powders have been studied to use in many fields, such as ferrofluids 2,3 , catalysts 4 , gas sensors [5][6][7][8] , biomedicine 9 and so on [10][11][12] . NiFe 2 O 4 is a cubic ferromagnetic oxide with a typical inverse spinel structure where Ni 2+ ions occupy octahedric B-sites and Fe 3+ ions equally distributed between tetrahedric A-sites and octahedric B-sites 13 .…”

Section: Introductionmentioning

confidence: 99%

“…NiFe 2 O 4 is a cubic ferromagnetic oxide with a typical inverse spinel structure where Ni 2+ ions occupy octahedric B-sites and Fe 3+ ions equally distributed between tetrahedric A-sites and octahedric B-sites 13 . Nanoscale NiFe 2 O 4 ferrites have been successfully synthesized by various methods including sol-gel 11,[14][15][16] , solid-state reaction 6,[17][18] , co-precipitation 7,12,19,20 , mechanochemical 21 , rheological phase reaction method 22 , pulsed wire discharge 23 , arc plasma assisted gas phase synthesis method 24 , combustion 25 , surfactant-assisted refluxing method 26 , micromulsion 27 , electrospinning 28 , thermolysis of mixed metal-oleate complexes 29 , sonochemical 30 and hydrothermal [31][32][33][34][35] . In this paper, we report a novel one-step, simple method to directly synthesize uniform, mass-production nanostructured NiFe 2 O 4 by the composite-hydroxide-salt-mediated (CHSM) method.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of inverse spinel NiFe2O4 nanocrystals and their superparamagnetic properties

2012

View full text Add to dashboard Cite

Spinel NiFe 2 O 4 nanocrystals have been obtained by means of a novel composite-hydroxide-salt-mediated approach, which is based on a reaction between metallic salt and metallic oxide in the solution of composite-hydroxide-salt eutectic at ~225 °C and normal atmosphere without any organic dispersant or capping agent. The obtained products are characterized by an X-ray diffraction (XRD), a transmission electron microscopy (TEM) and an alternating gradient magnetometer (AGM). The formation process of NiFe 2 O 4 nanosheet is proposed to begin with a ''dissolution-recrystallization'' which is followed by an ''Ostwald ripening'' mechanism. The NiFe 2 O 4 nano-octahedrons can be obtained through adjusting the reaction water content in the hydroxide melts at constant temperature. At 300 K, magnetic hysteresis loops at an applied field of 15 kOe show zero coercivity, indicating the superparamagnetic behavior of the as-prepared NiFe 2 O 4 nanocrystals.

show abstract

Preparation and gas-sensing properties of NiFe2O4 semiconductor materials

Cited by 65 publications

References 8 publications

Comparison of surface effects in SiO2 coated and uncoated nickel ferrite nanoparticles

Comparison of surface effects in SiO2 coated and uncoated nickel ferrite nanoparticles

Effect of annealing on properties of Mg doped Zn-ferrite nanoparticles

Facile synthesis of inverse spinel NiFe2O4 nanocrystals and their superparamagnetic properties

Contact Info

Product

Resources

About